<?php


namespace app\common\model;


use think\db\exception\DataNotFoundException;
use think\db\exception\DbException;
use think\db\exception\ModelNotFoundException;

/**
 * Class AttachmentCategory
 * @package app\admin\model\widget
 */
class AttachmentCategory extends BaseModel
{
    /**
     * 获取目录
     * @param string $type
     * @param int $pid
     * @param bool $lower
     * @return array
     * @throws DataNotFoundException
     * @throws DbException
     * @throws ModelNotFoundException
     */
    public static function getCategoryLst(string $type = "image", int $pid = 0, bool $lower = false)
    {
        $model = new self;
        $model = $model->where("type", $type);
        $model = $model->where("pid", $pid);
        $model = $model->field(['id', 'pid', 'name']);
        $data = $model->select();
        if ($lower) {
            $data = $data->each(function ($item) use ($type) {
                $item['children'] = self::getCategoryLst($type, $item['id']);
            });
        }
        return $data ? $data->toArray() : [];
    }

    /**
     * 获取目录名称
     * @param int $id
     * @return string
     */
    public static function getNameById(int $id)
    {
        return self::where("id", $id)->value("name") ?: "";
    }

    /**
     * @param string $type
     * @param int $pid
     * @param string $title
     * @return array
     * @throws DataNotFoundException
     * @throws DbException
     * @throws ModelNotFoundException
     */
    public static function buildNodes(string $type = "image", int $pid = 0, string $title = "")
    {
        $model = new self;
        $model = $model->where("type", $type);
        $model = $model->where("pid", $pid);
        if ($title != "") $model = $model->where("name", "like", "%$title%");
        $model = $model->field(['id', 'pid', 'name as text']);
        $data = $model->select()->each(function ($item) use ($type) {
            $item['nodes'] = self::buildNodes($type, $item['id']);
            if (empty($item['nodes'])) unset($item['nodes']);
        });
        return $data ? $data->toArray() : [];
    }

    /**
     * 遍历选择项
     * @param array $data
     * @param $list
     * @param int $num
     * @param bool $clear
     */
    public static function myOptions(array $data, &$list, $num = 0, $clear = true)
    {
        foreach ($data as $k => $v) {
            $list[] = ['value' => $v['id'], 'label' => self::cross($num) . $v['name']];
            if (isset($v['children']) && is_array($v['children']) && !empty($v['children'])) {
                self::myOptions($v['children'], $list, $num + 1, false);
            }
        }
    }

    /**
     * 返回选择项
     * @return array
     * @throws DataNotFoundException
     * @throws DbException
     * @throws ModelNotFoundException
     */
    public static function returnOptions(): array
    {
        $list = [];
        self::myOptions(self::getCategoryLst('image', '0', true), $list, 0, true);
        return $list;
    }
}